# a = input()
# b = input()
# print(f'a+b={eval(a)+eval(b)}')


#print(a*b,end=(''))
#print({:.2f}.format(a*b))
#print("{:20}".format(a*b))

#数值运算函数
# print(c**3)
# print(hex(c))
# print(abs(-9))
# print(round(4.34,1))
# print(pow(4,2,15))
# print(divmod(8,3))


#字符串
#st = "hello linhui"
#st = 'hello linhui'

# st = ''' fjhsdkhgfjkasdhgjkasdfhgbnjksadbhgnjkasfdhgkasldhfjksldjfh 
# fgasdgferdagfgfdgfdgdfg
# gfdasgrebgvdscbdf
# '''
# print(st)

# print('huangan\'sdog')
# print('huangans\\ndog')

# st = "abcdefgh"
# print(st[::-1])
# print(len(st))
# print(st[::2])
# print(st[-1:0:-1])

# st.split(" ",1)

# print(st.upper())
# print(st.lower())
#字符串查找
# print(st.find('c'))
# print(st.find("abcde"))
# print(st.rfind('c'))
# print(st.index('c'))
# print('a' in st)
# print('S' in st)
#字符串切分
# st = "a.b.c.d.e.f.g.h"
# print(st.split('.'))

# 字符串替换
# st = "abcdefgh"
# print(st.replace('abc','ABC'))
# print(st.replace('fgh','hahah'))

#格式控制
# val = 43.98877
# print("{:+10.2%}".format(val))
# print("{:+10.2f}".format(val))

# st = "abc"
# print(st*10)
